TURKISH TURMOIL: Investors are uneasy over whether Turkey's government can cope with a plunging currency, a diplomatic spat with Washington and other problems. President Recep Tayyip Erdogan has accumulated more and more control over Turkey's financial system and central bank. U.S. President Donald Trump said Friday he will authorize higher tariffs on Turkish steel and aluminum. That came after Turkey put an American pastor on trial on spying charges. Erdogan promised Sunday his government will take unspecified "necessary actions" to calm markets.

ANALYST'S TAKE: "Turkey's financial crisis has taken center stage, displacing trade wars as the immediate concern," said Eugene Leow of DBS Group in a report. Worries are building that "this may lead to contagion" across emerging markets, said Leow. "We fail to see how the crisis can be resolved without external support," but an International Monetary Fund support package will be difficult "given Turkey's current political situation."

ENERGY: Benchmark U.S. crude fell 5 cents to $67.58 per barrel in electronic trading on the New York Mercantile Exchange. The contract closed at $67.63 on Friday. Brent crude lost 18 cents to $72.65 in London. It closed at $72.83 the previous session.

CURRENCIES: The dollar declined to 110.24 yen from Friday's 110.93. The euro fell to $1.1385 from $1.1411.